Contrary to what this app mentions, there is no electric at Bockman. You would have to go to Ranger Lakes for that, also part of the State Forest State Park. But it's nice still.
There is a water site and a dump station (no water at dump station) and your required parks pass ($7/day) means you can use those, even if you're camped at Ranger Lakes. I don't think you even have to be camping to use those, just a pass.